Site-specific magnetic XANES

XANES evidence of arsenate removal from water with magnetic ferrite.

Arsenic (As) in groundwater and surface water is a worldwide problem possessing a serious threat to public health. In this study, a magnetic ferrite, was synthesized and investigated for its As(V) removal efficiency. The adsorption of As(V) by magnetic ferrite exhibited an L-shaped nonlinear isotherm, suggesting limiting binding sites on the adsorbent surface. The As K-edge X-Ray Absorption Nea...

Utilization of Site-Specific Recombination in Biopharmaceutical Production

Mammalian expression systems, due to their capacity in post-translational modification, are preferred systems for biopharmaceutical protein production. Several recombinant protein systems have been introduced to the market, most of which are under clinical development. In spite of significant improvements such as cell line engineering, introducing novel expression methods, gene silencing and pr...

XANES spectroscopy

The physics of x-ray absorption near-edge structure (XANES) spectra is described briefly using the multiple-scattering (MS) approach. This method is used for calculations of the scattering processes in small clusters of atoms. Further, the differences between XANES and x-ray absorption fine structure (EXAFS) regimes are pointed out. A few illustrative examples of Zn XANES spectra are shown and ...

Xanes/exafs Study of the Copper Active Site in Methanol Synthesis Catalyst

Xanes and Mössbauer Spectroscopy

The application of Mössbauer spectroscopy for the determination of the valance states of iron is obvious. However, in case of iron in tissues, this method often fails due to the low concentration of Mössbauer probe. On the other hand, the X-ray Absorption Near Edge Spectroscopy (XANES) requires a smaller amount of iron, but the acquired information on iron oxidation states is not straightforwar...